What is the primary input to the Create WBS (Work Breakdown Structure) process?

Correct answer: Scope Statement

Option A is correct because according to the PMBOK Guide the primary input to the Create WBS process is the Project Scope Statement, which defines the deliverables and work boundaries that the WBS decomposes into manageable components. Option B is incorrect because the Project Charter authorizes the project and names the project manager but does not contain the detailed scope definition needed to build a WBS; it is an input to earlier planning processes. Option C is incorrect because the Scope Management Plan describes how the scope will be defined and controlled but does not itself contain the deliverable descriptions that the WBS decomposes. Option D is incorrect because Requirements Documentation feeds into defining and verifying scope and is primarily an input to Create WBS as a supporting document, while the Scope Statement is the principal driver of decomposition.